Matemáticas mentales Worksheet
Recommended for 1er grado — 5to grado
Matemáticas mentales Worksheet
Name: ____________________Date: ____________
Instructions: Usar estrategias mentales como sumar diez, duplicar y compensar para calcular rápidamente.
20 problems
15 + 20 = ______
18 + 20 = ______
6 × 10 = ______
40 − 10 = ______
5 × 10 = ______
9 × 10 = ______
54 − 10 = ______
33 + 20 = ______
37 + 20 = ______
7 × 10 = ______
24 − 10 = ______
27 + 20 = ______
33 − 10 = ______
56 + 20 = ______
87 − 10 = ______
11 + 10 = ______
1 × 10 = ______
91 − 10 = ______
61 + 10 = ______
70 + 10 = ______
